3 years ago

Using the method of joints, determine the force in each member of the truss shown in the image.

Engineering

1 answer:

Marianna [84]3 years ago

6 0

Answer:

taft 67 ft

Explanation:

''.''

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3 years ago

A household refrigerator that has a power input of 450 W and a COP of 1.5 is to cool five large watermelons, 10 kg each, to 8°C.

Andreyy89

Answer:

6222.22 sec

Explanation:

Given data the power input to the refrigerator is 450 W

The COP of refrigerator is 1.5

Temperature $T_1=8^{\circ}C$

$T_2=28^{\circ}C$

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specific heat =4.2 KJ/kg°C

The amount of heat removed from 5 watermelon

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We know that $COP=\frac{Q_1}{W}$

$1.5=\frac{Q_1}{450}$

$Q_1=675$ W=0.675 KW

so time required to cool the watermelon is

$t=\frac{Q_1}{Q_2}=\frac{4200}{0.675}=6222.22 sec$

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